945b23c46f
We used to include platform.h only when MBEDTLS_PLATFORM_C was enabled, and to define ad hoc replacements for mbedtls_xxx functions on a case-by-case basis when MBEDTLS_PLATFORM_C was disabled. The only reason for this complication was to allow building individual source modules without copying platform.h. This is not something we support or recommend anymore, so get rid of the complication: include platform.h unconditionally. There should be no change in behavior since just including the header should not change the behavior of a program. This commit replaces most occurrences of conditional inclusion of platform.h, using the following code: ``` perl -i -0777 -pe 's!#if.*\n#include "mbedtls/platform.h"\n(#else.*\n(#define (mbedtls|MBEDTLS)_.*\n|#include <(stdarg|stddef|stdio|stdlib|string|time)\.h>\n)*)?#endif.*!#include "mbedtls/platform.h"!mg' $(git grep -l '#include "mbedtls/platform.h"') ``` Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
/*
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* Zeroize application for debugger-driven testing
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*
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* This is a simple test application used for debugger-driven testing to check
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* whether calls to mbedtls_platform_zeroize() are being eliminated by compiler
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* optimizations. This application is used by the GDB script at
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* tests/scripts/test_zeroize.gdb: the script sets a breakpoint at the last
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* return statement in the main() function of this program. The debugger
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* facilities are then used to manually inspect the memory and verify that the
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* call to mbedtls_platform_zeroize() was not eliminated.
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*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "mbedtls/build_info.h"
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#include <stdio.h>
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#include "mbedtls/platform.h"
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#include "mbedtls/platform_util.h"
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#define BUFFER_LEN 1024
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void usage( void )
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{
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mbedtls_printf( "Zeroize is a simple program to assist with testing\n" );
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mbedtls_printf( "the mbedtls_platform_zeroize() function by using the\n" );
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mbedtls_printf( "debugger. This program takes a file as input and\n" );
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mbedtls_printf( "prints the first %d characters. Usage:\n\n", BUFFER_LEN );
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mbedtls_printf( " zeroize <FILE>\n" );
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}
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int main( int argc, char** argv )
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{
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int exit_code = MBEDTLS_EXIT_FAILURE;
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FILE *fp;
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char buf[BUFFER_LEN];
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char *p = buf;
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char *end = p + BUFFER_LEN;
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int c;
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if( argc != 2 )
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{
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mbedtls_printf( "This program takes exactly 1 argument\n" );
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usage();
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mbedtls_exit( exit_code );
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}
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fp = fopen( argv[1], "r" );
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if( fp == NULL )
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{
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mbedtls_printf( "Could not open file '%s'\n", argv[1] );
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mbedtls_exit( exit_code );
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}
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while( ( c = fgetc( fp ) ) != EOF && p < end - 1 )
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*p++ = (char)c;
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*p = '\0';
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if( p - buf != 0 )
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{
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mbedtls_printf( "%s\n", buf );
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exit_code = MBEDTLS_EXIT_SUCCESS;
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}
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else
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mbedtls_printf( "The file is empty!\n" );
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fclose( fp );
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mbedtls_platform_zeroize( buf, sizeof( buf ) );
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mbedtls_exit( exit_code ); // GDB_BREAK_HERE -- don't remove this comment!
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}
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